Fertiliser recommendations for maize

Boysground

Member
Mixed Farmer
Location
Wiltshire
Had this conversation the other day actually. I used to give advice if asked irrespective of whether they bought fertiliser from me or not. It was the same as soil testing. Id take the samples, send them away and advise what was needed, the customer got their test results printed out and a shopping list of what to buy. I did not insist they needed to buy any of it from me.
I did come across some characters selling seed and then offering their own agronomic 'guidance' which presumably garnered additional fertiliser sales for them. One farmer had been led to believe he had to drill everything at 50,000 seeds and apply 3 cwt of AN to his not inconsiderable acreage of maize and that the nutrients in his manures of slurries was 'just a bonus'...
Very few of my former clients applied any nitrogen to their maize besides what was in the DAP in the starter. Even where they did apply it I could not percieve any difference in the crop at any kind.
Several people still got tremendous crops of maize despite drilling it into what we had assumed was tired old grassland, in those situations I suggested a dose of aftercut type fertiliser in the seed bed could be a good idea, but more often than not they didnt bother but the crop of maize was still stonking anyway.

Be wary of maize. There is a lot of pressure out there to make you spend a lot of money on it.

So true. A couple of days ago I had somebody tell me maize did not benefit from muck or slurry :banghead::banghead::banghead:

At least I wasn’t buying from them.

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So true. A couple of days ago I had somebody tell me maize did not benefit from muck or slurry :banghead::banghead::banghead:

At least I wasn’t buying from them.

Bg

Jesus, that is bad. Either through technical ignorance or plain porkies, im not sure what is worse really. Telling people to apply hefty doses of nitrogen with no consideration for what are often very large quantities of slurry or manure is going to eventually land people in trouble with the ministry.
 

Boysground

Member
Mixed Farmer
Location
Wiltshire
Jesus, that is bad. Either through technical ignorance or plain porkies, im not sure what is worse really. Telling people to apply hefty doses of nitrogen with no consideration for what are often very large quantities of slurry or manure is going to eventually land people in trouble with the ministry.

With phosphate the next target there could be issues for maize growers. Routine hefty doses of P along with muck on high index fields will not help.

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dinderleat

Member
Location
Wells
We took a farm on with 0 and 1s indexes so we fed fairly hard to start with cwt down the spout of dap 2cwt of mop in the seed bed and 2cwt of nitran plus muck. Still like to put a bit on but getting 20tn+ crops and holding 3 indexes you have to put something on
 

cowboysupper

Member
Mixed Farmer
So after some further deliberation and discussion with a few more farmers locally about what was initially recommended by the sales merchant, the consensus I'm getting is that farmers have tried RB209 recommendations for growing maize in Northern Ireland and it has unfortunately produced poor crops. 140 units of Nitrogen seems to be the norm in this part of the world.

Thanks for comments to date, alway good to get a second opinion!
 
Maize ground has had about 30t/ha of fym, what P and K should go on per assuming indexes are about right.

I would use about 1 cwt of DAP per acre down the spout and possibly 2-3 cwt/acre of some kind of after cut fertiliser like 24.0.14 or similar, assuming this is fertile dirt.

I'm not convinced you will get any more yield or grain out of maize from putting another 100 units of N on top of what I have outlined above.

If you want nothing but outright fresh weight grow later varieties at a higher seed rate.
 

JCfarmer

Member
Mixed Farmer
Location
warks
Sorry talking in ha's not that it matters. I haven't got DAP. I have 46% Phosphate plus some urea and nitram. MOP also
Think all would have to be applied separately?
 
So what do you recommend in kg/ha for tsp 46, mop 60?

I'd need to see soil test results for that. If you send yours to Yara they should come back with recommendations for these, they are basically out of RB209 anyway.

If your indices are 2 or 3 and you have applied 30t/ha of FYM I'd be very hesitant to make you apply much more P and K, Potash in particular will be heavy in most manures.
 

Tompkins

Member
Location
NE Somerset
Been growing maize for a long time and rarely do we top dress with N. This year we've put 150kg/ha DAP down the spout and most has had either poultry litter or FYM underneath it. Neighbour used to plaster his maize with nitrogen but I could never see a huge benefit from over the hedge.

In my experience the most important things are dealing with compaction and weed control.
 

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